The Italian is the sixth ATP singles player to qualify, leaving two spots up for grabs.
The trio are the fifth, sixth and seventh players to qualify for the WTA Finals.
The top two players have signed on for this year's 18-team Davis Cup Finals
The Davis Cup Finals are set for November 25-December 5th in Turin, Italy, and Madrid, Spain.
Former No. 1 Simona Halep praises Emma Raducanu and predicts she will be "one of the best players in the world."
Casper Ruud and Denis Shapovalov join the field for the December 16-18th exhibition event in Abu Dhabi.
The Brit is very high on Jannik Sinner's future - who isn't?
